Recipe from Deb Perelman for Smitten Kitchen; adjustments made for Intervale Food Hub members
Yield: 16 small bars, as shown, or 8 large ones; recipe can be doubled and baked in a 9×13-inch baking pan, where they will come out a little thicker
1 cup (80 grams) rolled oats
3/4 cup (95 grams) plus up to 2 tablespoons (15 grams) extra all-purpose flour
1/2 cup (95 grams) light brown sugar
Heaped 1/4 teaspoon table salt
6 tablespoons (85 grams) unsalted butter, melted
1 teaspoon cornstarch (optional, but helps firm up the filling)
1 tablespoon (15 ml) lemon juice
1 tablespoon (15 grams) granulated sugar, divided
1 cup (125 grams) small-diced rhubarb (from about 1 1/2 medium stalks)
1 cup (155 grams) small-diced strawberries
Powdered sugar, for decoration, if desired
Heat oven to 375 degrees F. For easy removal, line bottom and two sides of 8-by-8-inch square baking pan with parchment paper. No need to bother (and no greasing needed) if you plan to serve them right in the pan.
Place oats, 3/4 cup flour, brown sugar and salt in bottom of baking pan and mix. Pour melted butter over, and stir until clumps form. If the clumps feel soft or look overly damp, add the remaining 2 tablespoons flour. Set aside 1/2 cup of the crumble mixture. Press the rest of the crumb mixture evenly in the bottom of the pan.
Spread half the fruit over the crust. Sprinkle it evenly with cornstarch, then lemon juice, and 1/2 tablespoon of granulated sugar. Spread remaining fruit over this, and top with second 1/2 tablespoon sugar. Scatter reserved crumbs over fruit and bake bars for 30 to 40 minutes, until fruit is bubbly and crisp portion is golden and smells toasty and amazing.
Let cool in pan in the fridge. Cut into squares and sprinkle with powdered sugar before serving. Store leftovers in fridge.